mineral

Tiger's Eye

Tiger's Eye (SiO2 with crocidolite inclusions)

Hardness: 7 Mohs; Color: Golden to red-brown; Luster: Silky; Crystal structure: Trigonal (pseudomorph after crocidolite); Cleavage: None; Specific Gravity: 2.64-2.71

Hardness: 7 Mohs
Color: Golden to red-brown
Luster: Silky

Identified May 3, 2026More mineral →

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Physical properties

Hardness: 7 Mohs; Color: Golden to red-brown; Luster: Silky; Crystal structure: Trigonal (pseudomorph after crocidolite); Cleavage: None; Specific Gravity: 2.64-2.71

Formation & geological history

Formed when quartz replaces crocidolite asbestos fibers through a process called pseudomorphism. Predominantly found in Precambrian iron formations.

Uses & applications

Used extensively in jewelry (cabochons, beads), decorative carvings, and as a popular collectible gemstone due to its chatoyancy.

Geological facts

The 'eye' effect is known as chatoyancy. It is a pseudomorph, meaning one mineral has replaced another while retaining the original mineral's external shape.

Field identification & locations

Identified by its distinctive golden-yellow to brown bands and silky luster that 'shifts' when the stone is rotated under light. Common in South Africa and Western Australia.

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